Facing problem with android SDK while installing

Before I got some problem while importing the project into the editor. So, I thought that was the problem of the sdk and tried to reinstall that and took one of the other SDK from my friend and I have done all the things for the installation and at the end it has recommended me to restart the eclipse then after restarted the IDE it is showing some error

Then I went to SDK manager and tried to install some tools which it has downloaded from the net by itself but the开发者_如何学C problem is not solved. Can any one help me in this case?

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looks like somebody else already had the same problem: Huh? "SDK Platform Tools component is missing!"

Open Eclipse. Then:
  Window > Android SDK and AVD Manager
   > Available Packages: 
     > Android Repository:
       + Android SDK Tools, revision 8
       + Android SDK Platform-tools, revision 1

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